diff --git a/reference/pdo_pgsql/reference.xml b/reference/pdo_pgsql/reference.xml
index ab0df60bff..338ecc8f8d 100644
--- a/reference/pdo_pgsql/reference.xml
+++ b/reference/pdo_pgsql/reference.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
 
- <reference xml:id="ref.pdo-pgsql" xmlns="http://docbook.org/ns/docbook">
+ <reference xml:id="ref.pdo-pgsql" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
   <?phpdoc extension-membership="bundledexternal" ?>
   <title>PostgreSQL Functions (PDO_PGSQL)</title>
   <titleabbrev>PostgreSQL (PDO)</titleabbrev>
@@ -91,6 +91,15 @@
         </para>
        </listitem>
       </varlistentry>
+      <varlistentry>
+       <term><literal>sslmode</literal></term>
+       <listitem>
+        <para>
+         The SSL mode. Supported values and their meaning are listed in the
+         <link xlink:href="&url.pgsql.manual;">PostgreSQL Documentation</link>.
+        </para>
+       </listitem>
+      </varlistentry>
 
      </variablelist>
     </para>